/Engine/Plugins/Animation/MLDeformer/MLDeformerFramework/Source/MLDeformerFramework/Public/MLDeformerMorphModel.h
Set the order of importance during LOD, for the morph targets. Basically this specifies the sorted order of the morph targets, based on the error they introduce when disabling them.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="MLDeformerMorphModel") void SetMorphTargetsErrorOrder ( const [TArray](API\Runtime\Core\Containers\TArray)< int32 > & MorphTargetOrder, const [TArray](API\Runtime\Core\Containers\TArray)< float > & ErrorValues )